99893904 has 160 divisors (see below), whose sum is σ = 308551680. Its totient is φ = 27494400.

The previous prime is 99893897. The next prime is 99893929. The reversal of 99893904 is 40939899.

It is a super-2 number, since 2×99893904² = 19957584112722432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278077 + ... + 278435.

It is an arithmetic number, because the mean of its divisors is an integer number (1928448).

Almost surely, 2^99893904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99893904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154275840).

99893904 is an abundant number, since it is smaller than the sum of its proper divisors (208657776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99893904 is a wasteful number, since it uses less digits than its factorization.

99893904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 99893904 is about 9994.6937922079. The cubic root of 99893904 is about 463.9946739381.

The spelling of 99893904 in words is "ninety-nine million, eight hundred ninety-three thousand, nine hundred four".